Wes Welker missed three games last season after sustaining a pair of concussions in a two-month span. Now the Denver Broncos' star slot receiver must deal with yet another head injury.

Welker popped back up after taking a hit to the head from Texans safety D.J. Swearinger in Saturday night's 18-17 preseason loss to Houston. Considering his history, though, trainers immediately escorted him to the locker room for concussion tests. Welker did not return, and John Fox announced after the game that Welker indeed suffered a concussion.